using Content.Server.Atmos.EntitySystems;
using Content.Server.Atmos.Piping.Components;
using Content.Server.Atmos.Piping.Unary.Components;
using Content.Server.NodeContainer;
using Content.Server.NodeContainer.Nodes;
using Content.Shared.Atmos;
using JetBrains.Annotations;
using Robust.Shared.GameObjects;
using Robust.Shared.IoC;

namespace Content.Server.Atmos.Piping.Unary.EntitySystems
{
    [UsedImplicitly]
    public class GasOutletInjectorSystem : EntitySystem
    {
        [Dependency] private readonly AtmosphereSystem _atmosphereSystem = default!;

        public override void Initialize()
        {
            base.Initialize();

            SubscribeLocalEvent<GasOutletInjectorComponent, AtmosDeviceUpdateEvent>(OnOutletInjectorUpdated);
        }

        private void OnOutletInjectorUpdated(EntityUid uid, GasOutletInjectorComponent injector, AtmosDeviceUpdateEvent args)
        {
            injector.Injecting = false;

            if (!injector.Enabled)
                return;

            if (!EntityManager.TryGetComponent(uid, out NodeContainerComponent? nodeContainer))
                return;

            if (!nodeContainer.TryGetNode(injector.InletName, out PipeNode? inlet))
                return;

            var environment = _atmosphereSystem.GetTileMixture(IoCManager.Resolve<IEntityManager>().GetComponent<TransformComponent>(injector.Owner).Coordinates, true);

            if (environment == null)
                return;

            if (inlet.Air.Temperature > 0)
            {
                var transferMoles = inlet.Air.Pressure * injector.VolumeRate / (inlet.Air.Temperature * Atmospherics.R);

                var removed = inlet.Air.Remove(transferMoles);

                _atmosphereSystem.Merge(environment, removed);
            }
        }
    }
}